<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <!--需求 1：分别定义两个 div、span 标签，
    分别修改每个 div 标签的样式为：边框 1 个像素，实线，红色。

    -->
    <div style="border: 1px solid red; width: 100px; height: 100px; background-color: aqua; text-align: center">div标签1</div>
    <div style="border: 1px solid red">div标签2</div>
    <span style="border: 1px solid red">span标签1</span>
    <span style="border: 1px solid red">span标签2</span>
</body>
</html>